Refrigerating machine oil, working fluid composition for refrigerating machine, and method for producing refrigerating machine oil
AssigneeEneos Corporation
InventorsFumiyuki Nara, Yohei Shono, Hidetoshi Ogata
Life of this patent
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Abstract
An aspect of the present invention provides a refrigerating machine oil containing a mixed base oil of a first hydrocarbon base oil having a kinematic viscosity at 40° C. of less than 6 mm2/s and a second hydrocarbon base oil having a kinematic viscosity at 40° C. of 6 mm2/s or more, wherein a (A)/(B) ratio is more than 1 and 1.5 or less, wherein (A) is a kinematic viscosity at 40° C. of the mixed base oil, and (B) is the kinematic viscosity at 40° C. of the first hydrocarbon base oil.
Claims9
A refrigerating machine oil comprising a mixed base oil of
- a first hydrocarbon base oil having a kinematic viscosity at 40° C. of 1.5 mm2/s or more and 3.4 mm2/s or less, and comprising a mineral oil, and
- a second hydrocarbon base oil having a kinematic viscosity at 40° C. of 8 mm2/s or more and 384 mm2/s or less, and comprising at least one selected from the group consisting of a mineral oil and an ethylene-α-olefin copolymer,
- wherein a total content of the first hydrocarbon base oil and the second hydrocarbon base oil is 90% by mass or more based on the total amount of the refrigerating machine oil,
- wherein a content of the first hydrocarbon base oil is 70% by mass or more and 99.5% by mass or less, and a content of the second hydrocarbon base oil is 0.5% by mass or more and 30% by mass or less, based on the total amount of the first hydrocarbon base oil and the second hydrocarbon base oil,
- wherein a (A)/(B) ratio is more than 1.1 and 1.25 or less, wherein (A) is a kinematic viscosity at 40° C. of the mixed base oil, and (B) is the kinematic viscosity at 40° C. of the first hydrocarbon base oil, and
- wherein the refrigerating machine oil further comprises a phosphorus-containing additive selected from the group consisting of triphenyl phosphate, tricresyl phosphate, and triphenyl phosphorothionate,
- wherein a total content of the first hydrocarbon base oil and the second hydrocarbon base oil is 90% by mass or more, and a content of the phosphorus-containing additive is 1% by mass or more and 3% by mass or less, based on the total amount of the refrigerating machine oil, and
- wherein the refrigerating machine oil is used with a refrigerant.
A method for producing a refrigerating machine oil comprising a mixed base oil of p1 a first hydrocarbon base oil having a kinematic viscosity at 40° C. of 1.5 mm2/s or more and 3.4 mm2/s or less, and comprising a mineral oil, and
- a second hydrocarbon base oil having a kinematic viscosity at 40° C. of 8 mm2/s or more and 384 mm2/s or less, and comprising at least one selected from the group consisting of a mineral oil and an ethylene-α-olefin copolymer,
- wherein a total content of the first hydrocarbon base oil and the second hydrocarbon base oil is 90% by mass or more based on the total amount of the refrigerating machine oil,
- wherein a content of the first hydrocarbon base oil is 70% by mass or more and 99.5% by mass or less, and a content of the second hydrocarbon base oil is 0.5% by mass or more and 30% by mass or less, based on the total amount of the first hydrocarbon base oil and the second hydrocarbon base oil, and
- wherein the refrigerating machine oil further comprises a phosphorus-containing additive selected from the group consisting of triphenyl phosphate, tricresyl phosphate, and triphenyl phosphorothionate,
- wherein a total content of the first hydrocarbon base oil and the second hydrocarbon base oil is 90% by mass or more, and a content of the phosphorus-containing additive is 1% by mass or more and 3% by mass or less, based on the total amount of the refrigerating machine oil, and
- wherein the refrigerating machine oil is used with a refrigerant;
- the method comprising:
- mixing the first hydrocarbon base oil and the second hydrocarbon base oil such that a (A)/(B) ratio is more than 1.1 and 1.25 or less, wherein (A) is a kinematic viscosity at 40°° C. of the mixed base oil, and (B) is the kinematic viscosity at 40° C. of the first hydrocarbon base oil.
Dependencies are inferred from the claim text.